college

When marijuana's popularity exploded on the American cultural scene in the 1970s, college students figured prominently among the early adopters. Conservatives even imagined institutions of higher learning as centers of subversion from which the cannabis culture reached out its tendrils into the suburbs.

The data show that "college grads account for only about one-in-six days of use," the measurement used for national marijuana use. The remaining five sixths of today's cannabis market comprises, from largest to smallest share, people who attended some college (more than 90 percent of whom are no longer enrolled), high school dropouts, and teenagers.